Smoke-indicator.



" To all whom it may concern:

, UNITED strairns PATEN OFFICE...

' THOMAS w. MONEILL AND IRA J. BAIBCOCK, or CHICAGO, ILLINOIS.

Be'it known that we, THoMAs W. Mo- NEILL and IRA J. BABoooK, citizensofthe UnitedSt-ates, residing at Chicago, in the :county of Cookand-State of Illinois, have invented certain new and useful Improvementsin Smoke Indicators, of which the following is a specification.

Our invention relates to improvements in .mioke'indmators and moreparticularly to.

apparatus for association with a smoke eduction passage, as thebree'ching, stack, or other ductthrough which the products of combustionfrom a fuel burner pass, to enable its user to observe the relativetransparency or opacity existent within said passage.

One of the objects of our invention is to provide an apparatus operatingaccording to the principles embodied in the construction of our priorpatent No. 1,012,403, dated December 19, 1911, for, smoke-indicators,but having certain advantages over our previous yi-nventlon -in that itsusein dusty atmosreflecting mirrors, and in other matters "pheres doesnot -result in a disturbing depositn'pon the transparent closure and thewhich will become more apparent from a consideration of ,the followingdescription ing, or like,smokeseductingpassageway or a fluke, havingapplied thereto part of the ap- 3 a removed when taken in'coiijunotionwith the drawing,

wherein I Figure 1 is a sectional view'of a breechparatus; and Fig. 2'isa. sectional view of another part ofthe apparatus which in use isadapted p'aratus shown inFi'g. 1.

" In the showing illustrated in tlie drawing,

[5 indicates. the .breeching, exemplifying any suitable flue or otherpassageway leading from a fuel burner, and 6-6 indicate perforations'in'the walls oflsuchbreeching, the

perforations being diametric'ally opposite and each having associatedtherewith a tube,

' indicated respectively at 7 and 8. Each of said tubes 7 and 8 isrelatively short and has at one end'a. flange 9 by which it may besecured to the breeching. For cooperation l I relatively short tubes 7and 8 I provide suitable regulable-vent caps,

with the free otherwise-open nd of each said one whereof carand theother ries an illuminatingmeans"? whereofis closed. by a plate ofglass.-

' cifically, in the particular construction shown for purposes ofdisclosure,

10 indicates asmonn-mnicaron.

\ Specification of Letters Patent. Application filed March 17, 1913.Serial No. 754,937.

to be located atsdmerdistance from but in almement withthe ap- "samesort of perforations,

Patented July 14,1914;

thimbleadapted to inserted within the free end of tube 7, said thimblehaving a bead at 11 for coaction with the free edge 'of said tube andbeing outwardly. bent, as

at 13,- from a point somewhat beyond the bead 11, the thimble betweensaid bead and.

outwardly bentportion having a series of perforations 14. For coaction'with said perforated portion, we provide a similarly perforated,'rot-atably shiftable, ring, so that the thimble may be opened toprovide a series of vents into the tube 7, may be closed to preventpassage of air into the thimble, or may be partially opened to admitregulable quantities of air. 4 I

Hinged as at 16 upon the outwardly bent portion 13 of the thimble 10, weprovide a reflector 17,a spring clip 18 being preferably provided on.the tube portion 13 for engagement over the edge of the reflector toretain it tightly in place as a closure upon theend'of the thimble.Within the reflector we mount a suitable means for producing a light,such means preferably taking the form of an electric incandescent lamp19, current to which may be supplied by wires extending through the end20 of the reflector.

It will be seen'that the construction isoperable to completely close thethimble or to open the same by rotation of the ventedring 15.

generally ing, in lieu of'therefieotor and lamp, aglass plate 21'. Inother respects the construction of the closure for tube 8 resembles thatfor. tube 7, heretofore described, having the coa'cting perfo ratedring, hinge clip, etc., so that it will gnnecessary for--us to. describethe same-1n etail.

In this construction, the light from lamp 19passes through tube 7-,across. the smoke flue'5, through tube 8, and the glass plate 21' whichis carried by the thimble for said tube Upon the tube 8 we provide atliiinble, similar in construction, but hav- 8,3so that it may beobserved and the density of smoke passing through the flue thereby'detected. It usually happens, however,

that the observations are desired to be taken at points relativelyremote from the'flue to which the thimbles described have been applled,and thatsuchpoint of observatlon s not in direct alinement with thetubes -7 and 8. -'Our invention therefore contemv plates,

in conjunction with the apparatus already described, a deflectormechanism such as shown in Fig. 2. This mechanism,

as illustratively shown in the drawing, com-' prises a triangularlysh'aped casing member 1 having one of its sides open, as indicated 5 at26, over the opening of which may be hinged areflecting mirror 27, thehinge being indicated at 28 and a closure-retaining -cl ip',' similar toclip v18 for the lamp-reflector, being indicated at 29. The other two '1sides of said triangular casing each provide 'a sleeve, indicatedrespectively at 30 and 31,

- over one of w ich a relatively short tube '32, may be inserted. saidtube having free edges as at 33. When the readingfmay' be light, theother sleeve may be formed, as at 34, toprovide a hinge and at thediametrically' opposite side carries a clip for ,en-

gagement of a cylinder23, a translucent o screenbeing provided, asindicated on .the drawing, to receive the ray of'light and therebyfacilitate the reading. When, how-' ever more than one turn of thelight'ray is,

' required in order'to bring it -to the point of.

observation, intermediate deflectors'maybe used which omit thetranslucent screen In this installation of devicesas' above described',:as' many of the mirror-carrying casin s 25 maybeused as willbe necessaryto de act the ray, of light from the lamp 19" to the'desired point. ofobservation, and each ofsaid casir'lgs may be placed as far from thepreceeding one, or from' the flue t'o WhiCh. the tube 8"is applied, asmay beco'nvenient. In our previous. disclosure we have shown,a'continuou's tubing leading from one to the other of the turns requiredin the path of the light, but we'have, found from practical experiencethat, in the passage of 4 dust-laden air through the tubing and pastthem rrors 27-,a more or less opaque deposit soon accumulates upon saidmirrors so that the indication at the end of the tubing is not,

accurate.. The present invention will beseen to avoid this objectionwhich is'pres ent" :11 our previous apparatus, j Q

- 'In the use of the apparatus, setup as above stated, it' will'be. aparent that some smoke may pass u' into the tubes 7 vand 8' due to theeddg e ect produced thereby, so

that the light om lamp 19 would be deadenedto greater extent thanitshould be from passin through only the smoke 'in the v flue. There orethe rings 15- maybe turned to o nthe vents, and a draft will be causedto ow from the exterior air through said I vents 14, through the tubes'7 and 8 respecv 1- tubes it is at no time causedto strike against.

a f flj l ifi a e d by. Saree a -mirror' 27 since, in our presentapparatus,

non-essentia l details, without departing from the spirit of theinvention andwithin' ofqtwo irelatively short, diametrically opposite,alining' tubes associated with the flue,

' through the other. tub and a translucent j 1,153,603 that the tenden yJet said" plate to team I coveredwith dust is minimlzed andtha'c curacyof the systemincreased. Insimilar manner, there is no tendency tosmutthe j there is" n'oconstant passage of dust-laden air therepast; -Wehave therefore found thatthe present apparatus remains accurate initaindications through long periods of time, requiring less attentionthan--our earlier apparatus and at the same time eliminating the lonconnecting tubing with re-r du'ced cost and ess encumbrance to the roomJ across which the'ray of light passes. taken without further deflectionof the Other advantages will become apparent, '6 While wehave hereindescribed and shown an embodiment of our invention, itwill be apparentthat changes may be made in the the scope of the appendedclain'is,

Whatweclaimlsz -1 "1. In ancappairatus of the character de.

scribed, the combination, with a smoke flue,

one of said tubes'having assbciated therewithg a source of light and theether having its I end dlosed by 'a .glass' plate, and alight-defleetingstructure comprising a casing,'- a

extending from said casing at such an'angle I Q that a-ray of lightpassing throughone said tube and deflectedby the mirror-will pass platecarriedby one 0 said tubes, wherebysaid mirror-carrying casing may beplaced 1 with/one of itstubes in ali ement with the g plate-carryingtube of the ue, but spaced therefrom any desired distance, for purposesdescribed; '2, An apparatus 015 the character "de-' "scribed, for usewith a smoke flue, comprise 3 ing" a plurality of'separated devices,.each whereof provides ashort free ended tube for disposition inalinement with a like tube of another of said devices, a source of lightassociated-{with the smoke flue for pr jeQt' ing aray oflightacrossjtheflue through'one of said tubes, across the, intervening un-' occupiedspace between said vtub'e anc' l the alin ing tube of another of sa ddev ces, into 4 said alining tube: a deflecting mirror asso ciated withthat devic eiwhich'carries said) alining'tube; and a second shortfree-ended tube associatedwith said last mentioned de-f vice/for passagetherethrough ofsaidideflecte'd ray of hght, 1

-3; Anfap'paratus of the characterdescribed, for use with a smoke flue,comprising aplurality of; separated deY1Q(/S, 6B.Cli whereof provides as'hortfree-ended tube for disposition in alinement with a like tubeofflanother of said devices, asourc'eof li' ht 'associated'withthe smokeflue,for pro ectingc,

IIIIII'I'OI 1n said casing, short free-ended tubes with t tube;

space between said tubes and the, alining tube of the other said device,and into said.

aLinin1 tube; a deflecting mirror associated at device which carriessaid alining and a second short free-ended;tube associated with saidlast-mentioned device, for passage therethrough of said deflected 10 rayof light, and a plate in one of the tubes 1 of said mirror carrying'device toprevent currents of air therethrough for purposes described.

In testimony whereof wejhe reu nto s et onrh hands. .v

i' THOMAS W. MONEILL. J

IRA J. BABOOCK-. Y In the presence 015- I =1 MARY FL.A. I. LEN,. W. LINNALLEN.

